Dr. Yuichi Takushima Profile

Dr. Yuichi Takushima

R&D Manager at Optoquest Co Ltd

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Author

Publications (13)

Proceedings Article | 12 March 2024 Presentation + Paper

Novel output pulse control of CW pumped Nd:YVO4/Cr:YAG microchip laser

Rakesh Bhandari, Shota Sekiguchi, Xiaomin Wang, Tadashi Hajikano, Yuichi Takushima

Proceedings Volume 12864, 128640F (2024) https://doi.org/10.1117/12.3000124

KEYWORDS: Crystals, Pulsed laser operation, Laser crystals, Continuous wave operation, Laser applications, Temperature metrology, Supercontinuum generation, Photonic crystal fibers, Q switching, Q switched lasers

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Proceedings Article | 4 March 2022 Presentation + Paper

6 MW peak power UV microlaser using novel pumping

Rakesh Bhandari, Haruyuki Endo, Shota Sekiguchi, Tadashi Hajikano, Yuichi Takushima

Proceedings Volume 11980, 1198006 (2022) https://doi.org/10.1117/12.2607532

KEYWORDS: Pulsed laser operation, Ultraviolet radiation, Crystals, Medium wave, Semiconductor lasers, Laser applications, YAG lasers, Optical fibers, Picosecond phenomena

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Proceedings Article | 11 June 2021 Open Access

Analysis of temperature-induced drift rate error in interferometric multi-core fiber optic gyroscope

Shinji Mitani, Tadahito Mizutani, Yusaku Tottori, Haruyuki Endo, Yuichi Takushima

Proceedings Volume 11852, 118523E (2021) https://doi.org/10.1117/12.2599545

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Proceedings Article | 12 July 2019 Open Access

Experimental results of high power double-pass, double clad EYDFA

T. Araki, E. Mizuta, Y. Kobayashi, Y. Takushima, X. Wang, S. Sekiguchi

Proceedings Volume 11180, 1118033 (2019) https://doi.org/10.1117/12.2536030

KEYWORDS: Surface plasmons, Optical amplifiers, Fermium, Frequency modulation, Optical fibers, Free space optics, Collimators, Erbium, High power fiber amplifiers, Mirrors

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Proceedings Article | 12 March 2013 Paper

Ultra-violet generation by third-harmonic conversion in conventional solid-core fibers

Yuichi Takushima, Yosuke Orii, Asa Higashitani, Takeshi Manabe

Proceedings Volume 8604, 86040A (2013) https://doi.org/10.1117/12.2004203

KEYWORDS: Optical fibers, Ultraviolet radiation, Cladding, Luminescence, Silica, Refractive index, Picosecond phenomena, Wave propagation, Fiber lasers, Phase matching

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Proceedings Article | 11 November 2008 Paper

High reflection tolerance of 1.25-Gb/s RSOA-based WDM PON employing spectrum-sliced ASE source

H. C. Jeon, K. Y. Cho, Y. Takushima, Y. C. Chung

Proceedings Volume 7136, 71360N (2008) https://doi.org/10.1117/12.803892

KEYWORDS: Superluminescent sources, Reflectivity, Tolerancing, Wavelength division multiplexing, Receivers, Light, Polarization, Radon, Laser resonators, Optical filters

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Proceedings Article | 11 November 2008 Paper

Monitoring techniques for phase and OSNR of DPSK/DQPSK signals

Y. Takushima, H. Y. Choi, Y. C. Chung

Proceedings Volume 7136, 71360U (2008) https://doi.org/10.1117/12.803097

KEYWORDS: Modulators, Phase shift keying, Signal detection, Polarization, Modulation, Signal to noise ratio, Interference (communication), Receivers, Picosecond phenomena, Phase measurement

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Proceedings Article | 19 November 2007 Paper

Ultra-high speed MMF transmission using mode-field matched center launching technique

D. Shim, Y. Takushima, Y. Chung

Proceedings Volume 6783, 678322 (2007) https://doi.org/10.1117/12.741758

KEYWORDS: Multimode fibers, Single mode fibers, Multiphoton fluorescence microscopy, Connectors, Wavelength division multiplexing, Transmitters, Digital micromirror devices, Receivers, Local area networks, Electrical engineering

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Proceedings Article | 19 November 2007 Paper

Enhanced reflection tolerance of upstream signal in a RSOA-based WDM PON by using Manchester coding

A. Murakami, Y. Lee, K. Cho, Y. Takushima, A. Agata, K. Tanaka, Y. Horiuchi, Y. Chung

Proceedings Volume 6783, 67832I (2007) https://doi.org/10.1117/12.745769

KEYWORDS: Tolerancing, Wavelength division multiplexing, Signal attenuation, Modulation, Light sources, Receivers, Fabry–Perot interferometers, Signal generators, Passive optical networks, Mirrors

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Proceedings Article | 25 October 2005 Paper

In-service dispersion monitoring technique using dithered-filter method and its application to fast adaptive compensation in reconfigurable optical networks

Yuichi Takushima, Yoichi Hirota, Kiichi Yoshiara

Proceedings Volume 6014, 60140R (2005) https://doi.org/10.1117/12.630349

KEYWORDS: Dispersion, Clocks, Optical filters, Electronic filtering, Modulation, Optical networks, Bandpass filters, Transmitters, Time metrology, Tolerancing

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Proceedings Article | 25 October 2004 Paper

Linewidth of mode combs of passively and actively mode-locked semiconductor laser diodes

Yuichi Takushima, Hideyuki Sotobayashi, Matthew Grein, Erich Ippen, Hermann Haus

Proceedings Volume 5595, (2004) https://doi.org/10.1117/12.580046

KEYWORDS: Mode locking, Semiconductor lasers, Continuous wave operation, Amplitude modulation, Modulators, Transmittance, Modulation, Bandpass filters, Diodes, Pulsed laser operation

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Proceedings Article | 16 May 2003 Paper

The quantum ultraviolet catastrophe and the noise of an ultrashort pulse mode-locked laser

Yuichi Takushima, Hermann Haus, Franz Kartner

Proceedings Volume 5111, (2003) https://doi.org/10.1117/12.496930

KEYWORDS: Mode locking, Resonators, Fabry–Perot interferometers, Homodyne detection, Ultraviolet radiation, Ultrafast phenomena, Mirrors, Modulation, Electroluminescent displays, Oscillators

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Proceedings Article | 16 May 2003 Paper

Quantum noise in ultrashort solitons

Chan Park, Hermann Haus, Yuichi Takushima

Proceedings Volume 5111, (2003) https://doi.org/10.1117/12.500150

KEYWORDS: Solitons, Kerr effect, Dispersion, Phase velocity, Mode locking, Polarization, Quantum computing, Modulation, Fourier transforms, Electronics

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Showing 5 of 13 publications

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